RVM need It. The install script tries to install these packages on debian squeeze:

    requirements_debian_libs_install bash curl patch bzip2 ca-certificates gawk g++ gcc make
    libc6-dev patch openssl ca-certificates libreadline6 libreadline6-dev curl zlib1g zlib1g-dev
    libssl-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev autoconf libc6-dev
    libgdbm-dev libncurses5-dev automake libtool bison pkg-config libffi-dev